This paper describes a highly efficient [3 + 2] reaction between 3-vinylindoles and 3-indolylmethanols. Novel 2,3-bisindolylmethanes were prepared as single diastereoisomers in high yields with the promotion of 1 mol% 2-hydroxy-3,5-dinitrobenzoic acid.
![Graphical abstract: Highly efficient [3 + 2] reaction of 3-vinylindoles with 3-indolylmethanols by Brønsted-acid catalysis](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C3RA47056C&imageInfo.ImageIdentifier.Year=2014)
C. Zhang, L. Zhang, Y. Qiu, B. Xu, Y. Zong and Q. Guo, RSC Adv., 2014, 4, 6916 DOI: 10.1039/C3RA47056C
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